<template>
    <div>
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>
      </el-breadcrumb>

      <el-card>
        <el-alert title="注意:只允许为第三级分类设置相关参数!" type="warning" :closable=false show-icon>
        </el-alert>

        <el-row class="cat_opt">
            <el-col>
                <span>选择商品分类:</span>
            <el-cascader
                 v-model="selectedCatKeys"
                 :options="catelist"
                 :props="{ expandTrigger: 'hover',value: 'cat_id', label: 'cat_name', children: 'children' }"
                 @change="handleChange">
            </el-cascader>
            </el-col>
        </el-row>

        <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <el-tab-pane label="动态参数" name="many">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click='addDialogVisible = true'>添加参数</el-button>
                <el-table :data="manyTableData" border stripe>
                  <el-table-column type="expand">
                    <template slot-scope="scope">
                      <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                      <el-input
                          class="input-new-tag"
                          v-if="scope.row.inputVisible"
                          v-model="scope.row.inputValue"
                          ref="saveTagInput"
                          size="small"
                          @keyup.enter.native="handleInputConfirm(scope.row)"
                          @blur="handleInputConfirm(scope.row)">
                        </el-input>
                      <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                    </template>
                  </el-table-column>
                  <el-table-column type="index"></el-table-column>
                  <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                  <el-table-column label="操作">
                    <template slot-scope="scope">
                      <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                      <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                    </template>
                  </el-table-column>
                </el-table>
            </el-tab-pane>
            <el-tab-pane label="静态属性" name="only">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click='addDialogVisible = true'>添加属性</el-button>
                <el-table :data="onlyTableData" border stripe>
                  <el-table-column type="expand">
                    <template slot-scope="scope">
                      <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                      <el-input
                          class="input-new-tag"
                          v-if="scope.row.inputVisible"
                          v-model="scope.row.inputValue"
                          ref="saveTagInput"
                          size="small"
                          @keyup.enter.native="handleInputConfirm(scope.row)"
                          @blur="handleInputConfirm(scope.row)">
                        </el-input>
                      <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                    </template>
                  </el-table-column>
                  <el-table-column type="index"></el-table-column>
                  <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                  <el-table-column label="操作">
                    <template slot-scope="scope">
                      <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                      <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                    </template>
                  </el-table-column>
                </el-table>
            </el-tab-pane>
        </el-tabs>
      </el-card>
      <el-dialog
           :title="'添加' + titleText"
           :visible.sync="addDialogVisible"
           width="50%" @close="addDialogClosed">
           <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
              <el-form-item :label="titleText" prop="attr_name">
               <el-input v-model="addForm.attr_name"></el-input>
              </el-form-item>
           </el-form>
           <span slot="footer" class="dialog-footer">
             <el-button @click="addDialogVisible = false">取 消</el-button>
             <el-button type="primary" @click="addParams">确 定</el-button>
           </span>
      </el-dialog>
      <el-dialog
           :title="'修改' + titleText"
           :visible.sync="editDialogVisible"
           width="50%" @close="editDialogClosed">
           <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
              <el-form-item :label="titleText" prop="attr_name">
               <el-input v-model="editForm.attr_name"></el-input>
              </el-form-item>
           </el-form>
           <span slot="footer" class="dialog-footer">
             <el-button @click="editDialogVisible = false">取 消</el-button>
             <el-button type="primary" @click="editParams">确 定</el-button>
           </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      catelist: [],
      selectedCatKeys: [],
      // 被激活的页签的名称
      activeName: 'many',
      manyTableData: '',
      onlyTableData: '',
      addDialogVisible: false,
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数的名称', trigger: 'blur' }
        ]
      },
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数的名称', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败!')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    handleChange () {
      this.getParamsData()
    },
    handleTabClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    async getParamsData () {
      if (this.selectedCatKeys.length !== 3) {
        this.selectedCatKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数失败!')
      }
      console.log(res.data)
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败!')
        }
        this.$message.success('添加参数成功')
      })
      this.getCateList()
      this.addDialogVisible = false
    },
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('添加参数信息失败!')
      }
      this.editForm = res.data
      this.editDialogVisible = true
      console.log(res.data)
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数信息失败!')
        }
        this.$message.error('修改参数信息成功')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    async removeParams (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败!')
      }
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    async saveAttrVals (row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ') })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败!')
      }
      this.$message.success('修改参数项成功')
    },
    showInput (row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    isBtnDisabled () {
      if (this.selectedCatKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectedCatKeys.length === 3) {
        return this.selectedCatKeys[2]
      }
      return null
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态属性'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt {
   margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag{
  width: 120px;
}
</style>
